Careful - the soundtrack probably isn't suitable for work or family, but the content of the video is what counts - feel free to turn off audio if you want to, as there's no dialogue.

If you can't access the youtube video from the page, there's a note underneath with some details on how they created their kettlebells.

I was thinking of having a go at this (KBs seem ridiculously expensive for what they are), and it seems a bit easier than trying to track down the appropriate bits for Tim's home-made KB at my local hardware store.

I just purchased all required materials from Home Depot and it was about $13. Works great! Only thing is...you need to have your own weights (plates) at home....either that or you can take the shaft to the gym and use the weights they have there. I like this home-made version because you can add weight as you go. I am a beginner and starting out with 15 lbs.